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Topic: The Origin of Species



  
 origin - Hutchinson encyclopedia article about origin
These facts seemed to me to throw some light on the origin of species--that mystery of mysteries, as it has been called by one of our greatest philosophers.
The Origin of Species by Darwin, Charles View in context
While our family has followed the general human law in the matter just mentioned, it forms a marked exception to the rule that so absolutely controls all of white blood, on this continent, in what relates to immigration and territorial origin.
http://encyclopedia.farlex.com/origin   (209 words)

  
 spvrt10.txt
The inference that the origin of the cultivated plants is multiple, in most cases, and that more than one, often many separate elementary forms of the same species must originally have been taken into cultivation, throws much light upon many highly important problems of cultivation and selection.
LAMARCK The origin of species is an object of inquiry.
I shall try to depict them to you in the first place as they are seen in [16] nature and in culture, leaving the question of their origin to a subsequent experimental treatment.
http://www.gutenberg.org/dirs/etext05/spvrt10.txt   (21874 words)

  
 Multi-regional origin Info - Encyclopedia WikiWhat.com
This view contrasts with the single origin hypothesis, which holds that modern Homo sapiens evolved from a single, geographically localised, ancestral hominid population, whose descendants ultimately replaced all other species of hominids over the course of tens of thousands of years without interbreeding or subspeciation.
Nevertheless, proponents of multiregionalism such as Wolpoff believe the molecular data can be reconciled with the multiregional origin hypothesis, and may even support it.
For instance, in 2001, a team of Chinese scientists wrote: "all Y-chromosome samples from China, with no exception, were originally derived from a lineage of African origin.
http://wikiwhat.com/encyclopedia/m/mu/multi_regional_origin.html   (445 words)

  
 Quote Mine Project: Gould, Eldredge and Punctuated Equilibria Quotes
Species are stable entities with very brief periods of fuzziness at their origin (although not at their demise because most species disappear cleanly without changing into anything else).
We argued that two outstanding facts of the fossil record -- geologically "sudden" origin of new species and failure to change thereafter (stasis) -- reflect the predictions of evolutionary theory, not the imperfections of the fossil record.
On the other hand, it has been suggested that this quote mine may be simply intended to attack the out-of-Africa model because young-Earth creationists prefer an origin of humans in the Tigris-Euphrates area of Iraq based on their reading of where the Garden of Eden was located according to the Bible.
http://www.talkorigins.org/faqs/quotes/mine/part3.html   (445 words)

  
 Belgian Journal of Botany Volume 136 Issue 1 - Sun et al.
Hybrid origin of the diploid species Hippophae goniocarpa evidenced by the internal transcribed spacers (ITS) of nuclear rDNA
The vegetative reproduction and/or relatively recent origin may be responsible for event of concerted evolution between repeats having not operated in the hybrid species.
Distributional pattern and relatively recent origin of this hybrid indicate that this species may have occurred several times.
http://www.br.fgov.be/tmp/BJB/CONTENTS/v136_1_9.htm   (194 words)

  
 CCCU : Resource Center On Human Origins: A Survey
As the human genome is better understood, the total number of common patterns found between species may require an unreasonably large founding population, implying that this transspecies similarity has other than ancestral origin.
Until about 150 years ago, the subject of human origins was almost exclusively the domain of religion.
For example, the institution of monogamous marriage, the origin of sin and the resultant corruption and mortality of mankind, are all grounded in God’s interaction with a single male-female pair of human beings, from whom all mankind are descended.
http://www.cccu.org/resourcecenter/rc_detail.asp?resID=974&parentCatID=159   (194 words)

  
 Origins
This is microevolution, a change in gene frequencies of a population without speciation (the origin of a new species); microevolution is very important to generate local adaptations to a variable environment, but has little to do with the mechanisms by which one species changes into another.
This indicates that whatever differences exist, they are of recent origin.
All paleoanthropologists agree that such local evolution had to occur in at least one place, but the argument about the origins of modern groups of humans centers on what happened next.
http://www.linfield.edu/~mrobert/origins.html   (194 words)

  
 Multiregional hypothesis - Wikipedia, the free encyclopedia
This view contrasts with the single origin hypothesis, which holds that modern Homo sapiens evolved from a single, geographically localised, ancestral hominid population, whose descendants ultimately replaced all other species of hominids over the course of tens of thousands of years without interbreeding or subspeciation.
This is of no surprise, because current understanding is that the earlier hominid species have originated also from Africa.
Nevertheless, proponents of multiregionalism such as Wolpoff believe the molecular data can not only be reconciled with the multiregional origin hypothesis but in fact in some cases supports it.
http://en.wikipedia.org/wiki/Multi-regional_origin   (885 words)

  
 Human evolution - Wikipedia, the free encyclopedia
Likewise, the ongoing study of the origins of Homo sapiens often demonstrates that there were other Homo species, all of which are now extinct.
The idea that humans are similar to certain great apes had been obvious to people for some time, but the idea of the biological evolution of species in general was not legitimized until after Charles Darwin published On the Origin of Species in 1859.
The origins of humanity have often been a subject of great political and religious controversy.
http://en.wikipedia.org/wiki/Human_evolution   (1493 words)

  
 Encelia abstracts
Restriction fragment analysis of cpDNA showed no variation among any Encelia species making a hypothesis of hybrid origin untestable.
Three species are of hybrid origin, one involving a parent from each of the two clades.
In both cases, the species of hybrid origin are morphologically intermediate to the parents, and E.
http://www.csupomona.edu/~jcclark/encelia/abstracts.html   (1303 words)

  
 London Plane Tree: Feb 2003
These species do hybridize, however, producing offspring that are extremely similar to the London plane tree, and molecular techniques will probably be used some day to firmly prove or disprove the hybrid origin of the London plane tree.
The basis for this conjecture is merely the recorded presence of the parental species in the nursery garden, however.
There are several different hypotheses about the origin of the London plane tree, and some people don't believe that it's really a hybrid between the oriental plane tree and the American sycamore.
http://www.k-state.edu/audubon/morgan_02_03.htm   (469 words)

  
 Origin of the Species- Chapter VIII Hybridism
Hybrids from two species which are very difficult to cross, and which rarely produce any offspring, are generally very sterile; but the parallelism between the difficulty of making a first cross, and the sterility of the hybrids thus produced--two classes of facts which are generally confounded together--is by no means strict.
Hybrids, however, are differently circumstanced before and after birth: when born and living in a country where their two parents can live, they are generally placed under suitable conditions of life.
Hybrids, on the other hand, have their reproductive organs functionally impotent, as may be clearly seen in the state of the male element in both plants and animals; though the organs themselves are perfect in structure, as far as the microscope reveals.
http://anatomy.med.unsw.edu.au/cbl/library/Darwin_C/Origin_of_Species/ch08.htm   (7753 words)

  
 Article: Does Evolution have any Religious Significance?
Six arenas in which evolution may have significance for Christian theism are discussed: the claim that evolutionary theory is intrinsically atheistic; the role of chance; the origin of life; the origin of species; the origin of humankind; and the problem of pain, suffering, death and the Fall.
The origin of life is therefore marked by striking scientific ignorance.
As a Christian I accept the authority of Scripture in all matters relating to faith and conduct, and I believe that the early chapters of Genesis provide us with a vital theological account of the origins and purposes of humankind, an account which is seminal for our understanding of the rest of the Bible.
http://www.cis.org.uk/articles/evolution_relig_signif/alexander_01.htm   (7753 words)

  
 New and old lip-ferns of Oregon
The fact that particular species of ferns have originated through hybridization is usually not mentioned in standard floristic references, but an outstanding exception is the recently published Flora of North America, Volume 2 (1993).
One might as well ask, "Is the Pope Catholic?" Ferns are notorious for their propensity to develop "hybrid complexes," in which species cross-fertilize in multiple combinations and the hybrids establish true-breeding sexual or asexual populations.
In this volume, which covers North American pteridophytes and gymnosperms, there are charts showing species' relationships within many genera, citing numerous hybrids which may be sterile, sexually fertile, or fertile by asexual means.
http://www.oregonflora.org/ofn/v7n1/lip_ferns.html   (667 words)

  
 The evolutionary origins of three new Neotyphodium endophyte species from grasses indigenous to the Southern Hemisphere -- Moon et al. 94 (4): 694 -- Mycologia
The evolutionary origins of three new Neotyphodium endophyte species from grasses indigenous to the Southern Hemisphere -- Moon et al.
The evolutionary origins of three new Neotyphodium endophyte species from grasses indigenous to the Southern Hemisphere
apparently non-hybrid origin, and three lineages of unique interspecific
http://www.mycologia.org/cgi/content/abstract/94/4/694   (293 words)

  
 Beliefnet.com
Not so, If we are one species (and we are), than the likelihood of multi regional origin can be reduced to almost nil...
Not so, If we are one species (and we are), than the likelihood of multi regional origin can be reduced to almost nil, it would require that the same species evolve nearly simultaneously, in two or more disparate locations, under widely varied environmental conditions, along exactly parallel lines.
I don’t know that anyone has even attempted top calculate the odds against that happening, but winning the lottery would have to be a sure thing by comparison.
http://images.beliefnet.com/boards/message_list.asp?pageID=17&discussionID=332645&messages_per_page=4   (585 words)

  
 reptileparthenogens.html
Lacertidae 5 species of Lacerta, all 2N, all hybrid origin Teiidae At least 15 species of Cnemidophorus, 2N and 3N, all hybrid origin Gymnophthalmidae Gymnophthalmus underwoodi (ploidy?) Gekkonidae Hemidactylus garnoti, 3N, hybrid origin (other Asian Hemidactylus) Gehyra variegata, 3N, hybrid origin Lepidodactylus lugubris, 2N, not of hybrid origin?
Heteronotia, many unisexual 3N clones, hybrids among 3 species Xantusiidae Lepidophyma flavimaculata, 2N, some populations bisexual, probably not of hybrid orgin Leiolepididae Leiolepis belliana, 3N, hybrid origin Chameleonidae Brookesia spectrum (ploidy?) Typhlopidae Rhamphotyphlops braminius, 3N, presumably hybrid origin
http://www.zo.utexas.edu/courses/herpetology/reptileparthenogens.html   (86 words)

  
 Multiregional hypothesis - Wikipedia, the free encyclopedia
This view contrasts with the single origin hypothesis, which holds that modern Homo sapiens evolved from a single, geographically localised, ancestral hominid population, whose descendants ultimately replaced all other species of hominids over the course of tens of thousands of years without interbreeding or subspeciation.
Nevertheless, proponents of multiregionalism such as Wolpoff believe the molecular data can not only be reconciled with the multiregional origin hypothesis but in fact in some cases supports it.
In 2001 a team of Chinese scientists wrote: "all Y-chromosome samples from China, with no exception, were originally derived from a lineage of African origin.
http://en.wikipedia.org/wiki/Multiregion_origin   (486 words)

  
 New Fossil Study Rejects "Eve Theory" And Supports Diverse Ancestry Of Modern Humans
The study, by U-M anthropologist Milford H. Wolpoff and colleagues, is one of just a few to base its controversial conclusion about the origin of the human species on a comparison of actual human fossils---early modern and archaic fossil skulls from around the world.
Other scientists, including Wolpoff and colleagues Hawks, Frayer, and Hunley, maintain that there is little evidence that a small group originating in a single geographic region replaced the entire population of early humans.
The genetic evidence has always been unclear, Wolpoff and colleagues note, because different genes support different theories: mitochondrial genes support replacement theory while nuclear genes support the development of an older, worldwide species of human ancestors.
http://www.sciencedaily.com/releases/2001/01/010111194453.htm   (881 words)

  
 Evolution: The Origin and Subsequent Elaboration of the 'Chromosomal' Hypothesis of Hybrid Sterility
Well aware of inconsistencies in the theory of the origin of species by natural selection, Darwin had made their resolution his life's main focus.
Evolution: The Origin and Subsequent Elaboration of the 'Chromosomal' Hypothesis of Hybrid Sterility
Whereas the work of Gregor Mendel (1865) may have been unrecognized until 1900 because of the relative obscureness of its originator and his location, George Romanes was at centre stage.
http://post.queensu.ca/~forsdyke/evolutio.htm   (7598 words)

  
 Nat' Academies Press, Variation and Evolution in Plants and Microorganisms: Toward a New Synthesis 50 Years after Stebbins (2000)
3 The Chimeric Eukaryote: Origin of the Nucleus from the Kar..., pp.
Hybridization between species or between disparate source populations may serve as a stimulus for the evolution of invasiveness.
Anderson (1948) noted that disturbance, human or otherwise, opens an array of niches that might be better suited for hybrids than for their parents.
http://www.nap.edu/openbook.php?record_id=9766&page=289   (8552 words)

  
 CPN Samples
This area is of interest because there is strong evidence that the species is of hybrid origin and this is the only area where the putative parents, D.
In 1955, Wood detailed a compelling argument for the hybrid origin of D.
Wood, C.E. 1955, Evidence for the Hybrid Origin of Drosera anglica, Rhodora 57:105-130.
http://www.carnivorousplants.org/cpn/samples/Science284Dxanglica.htm   (3093 words)

  
 Origin - Wikipedia, the free encyclopedia
The Origin may refer to Charles Darwin's 1859 book The Origin of Species
The origin of something (from the Latin origo, "beginning") is where it came from, in the sense of a physical location or a metaphysical source.
Origin (mathematics), the point where the coordinate axis of the system intersect.
http://en.wikipedia.org/wiki/Origin   (289 words)

  
 Human Evolved Recently
Here is the "no-doubt-about-it" evidence, clear for all to see: our species left Africa 52,000 years ago, just as the "recent African origin hypothesis" says.
One group of scientists argue that our species, Homo sapiens, is a late arrival on the human scene.
This result is just what the "recent African origin" hypothesis predicts.
http://www.txtwriter.com/Onscience/Articles/humanevo.html   (289 words)

  
 Caladium x hortulanum
The fancy-leaved caladium, Caladium x hortulanum, is the most commonly grown species of caladium and is a species of hybrid origin.
Some cultivars, in particular some of the strap-leaved (or lance-leaved) types, are hybrids which have C.
http://facultystaff.vwc.edu/~presslar/greenhouse/caladium/xhortulanum/description.htm   (135 words)

  
 EVOLUTION/LECTURE1
III: The origin of the species Homo sapiens:
6.- Controversies over the origin of modern humans
These dates appear to refute the multiregional origin hypothesis by criterion
http://www.fiu.edu/%7Ebiology/pcb4674/ch19/ch19.html   (135 words)

  
 New Evidence for Multiregional Origins
According to Mario Pei, the roots of English, an indo-european language, originated in the vicinity of Iran, about 2500 bc.
The original meanings of only a limited number of hypothetical Proto-Indo-European words can be stated with much certainty; derivatives of these words occur with consistent meanings in most Indo-European languages.
Although the sample sizes of both individuals and traits were small, statistical tests indicated that the recent African origin hypothesis was not proven.
http://www.freerepublic.com/forum/a3b96bdc0716e.htm   (135 words)

  
 Untitled Document
Those who think modern humans originated only in Africa and then spread around the world support what is known as the Out of Africa hypothesis.
According to the Out of Africa hypothesis, also known as the Replacement hypothesis, the transition to modern humanity occurred in only one area, which is consistent with the idea that new species usually arise from small, geographically isolated populations.
Studies of nuclear DNA also suggest an African origin for other genes besides mtDNA.
http://www.mnh.si.edu/anthro/humanorigins/faq/Encarta/diversity.htm   (135 words)

  
 Y-Chromosome Adam?
In other words, a date of origin consistent with Biblical chronology is within the confidence limits, even with the evolutionary assumptions employed.
They then estimated how long the human kind could have been around since its origin, with no variation in such a DNA segment, and estimated between 27,000 and 270,000 years, depending on what assumptions were used in the model of population genetics.
The multi-regional models of human origin favoured by many evolutionists, such as Wolpoff, are not consistent with these data.
http://www.answersingenesis.org/tj/v9/i2/y_chromosome.asp   (596 words)

  
 MBR: Internet Bookwatch, November 2004
Originally designed and published as a children's book for teenage readers, Philip Hoose's The Race To Save The Lord God Bird is also confidently recommended an ideal introduction for an adult readership as a very highly recommended survey of the process of extinction and changing attitudes towards understanding and protecting species and habitats.
Originally written in 1976 (under the title "Assault on a Wilderness"), Saving The Big Thicket: From Exploration To Preservation, 1685-2003 is the environmental saga of a ten-year war between conservationists and timber companies concerning the 84,550 acres of the Texas Big Thicket National Preserve.
Stephen Alter's Elephas Maximus (0151006466, $25.00) provides a portrait of the Indian elephant, coveted by poaches for its ivory tusks and revered in Indian religion.
http://www.midwestbookreview.com/ibw/nov_04.htm   (15655 words)

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